One benefit of doing swatches for the Walker Treasury project is seeing how I like a pattern for these hats. I've been doing ribbing patterns for this very reason. This stitch is called little shell ribbing; it winds up looking almost like a mock cable, to me at least. The yarn is stretchy (Baruffa Maratona 100% merino wool, won 8 skeins in this nice blue on eBay) but I think this pattern would have nice stretchiness to it. Would make a nice sock, don't you think?